Fire door or shutter.



F. L. SAINO.

FIRE DOOR 0R SHUTTER.

APPUCATION FILED JAN.25. 1912.

1,146,960. Patented July 20, 1915.

[N VEN T 0R A llmney COLUMBIA FLANOURAPH c0. WASHINGTON. D :7v

tion.

times ares rare FELIX LAwEENc SAINo, 0E MEMPHIS, TENNESSEE, LASSIGNOR.TO SAINO FIRE noon & SHUTTER co, 0E MEMPHIS, TENNESSEE, A co roaArIoN 0ETENNESSEE.

To all whom it may concern: 1

Be it known that I, FELIX L. SAINo, a i at Memphis, in the county; ofShelby and State of Tennessee, have invented certain new and usefulImprovements in FireDoors or Shutters, of which the following is aspecifica- My invention relates to certainnew useful improvements infire doors and shutters,and has especial-reference toithat class ofsheet metal doors which is fully described and claimed in the priorPatent No.

982,303, January 24, 1911. I

An essential object of the present invention is to improve'theconstruction of the door or shutter, first,by simplifying theconstruction in that the stiffening frame of the door comprisesfewer'parts; second, by doing away with the rawedge of the front .wallwhich is shown as lapping the vertical stiffeningframe in the formerpatent.

-My present invention materially cheapens the cost of the door while atthe same time improving its appearance. To accomplish this end I retainmost ofthe essential features shown in the formerpatent, but dispensewith certain parts which I deem unnecessary in doors'or'shutters foropenings of ordinary size.- The slidable stiffening bar, shown as 1eFigure 7 in. the prior patent is not used in myjpresent invention 'as Ifind'that by interlocking the stiffeningchannels of the frame with thefront wall of the door, these stiffeningflchannels are held insufficiently rigid alinement in doors of ordinary size by thevinterlock.The spacing bar shown as 11 Fig.- 7 of theprior patent may also bedispensed with in doors of orinary size. In the present construction,

.which is hereinafter'fully explained, the

door or shutterismade with-the front wall substantially in a singlesheet ofmetal, and

the rear wall is comprised of a'pluralityof overlapping sheets of"metal, and-an interposed layer of refractory material.

The interlocking fiangesor edges of the sheetwhich 'coxistitutethe frontwall of the door and the outer edges of the channel Specification ofLetters Patent.

Application filed January 25, 1912.

that the, front wall may,

made of corrugated metal, made, the corrugations of the front wall FIREDOOR OR SHUTTER.

rammed July 2c, 1915.

Serial No. 673,291.

members which form the hollow side sections or stiles of the door extendsubstantially the full length of the .door, the construction being suchthat the stile is expansible' in a traight line, and in unison with thebody of the door in substantially the manner described in the aforesaidpatent.

With the above and other objects in View,

my invention consistsof the parts and the constructions, arrangementsand combination of parts, which I will hereinafter describe and claim.

In the accompanying drawing forming part of this specification and inwhich similar reference characters indicate like parts in the severalviews; Fig. 1 is a section on the line X-X of Fig. 2, of a portion ofthe door showing the hollow stile 14: or section at one side thereof,and showing the telescoping connection between the edges of the frontwall of the door and the several channel members which form the saidstile or section. Fig. 2 is-a rear elevation of a part of the door.

In said drawing the door is shown as consisting fundamentally of therear wall, 1, of sheet metal, a front wall, 3, of sheet metal, and anintermediate sheet, 2, of some ap-- propriate refractory substance suchas asbestos. The construction of these parts may follow more or, lessclosely the construction 1 and arrangements of the corresponding partsof the former patent, it being understood. if desired, be formed of asingle sheet of metal, or two or more sheets may be used, rivetedtogether to form the equivalent of a single sheet. The rear wall isformed of two or more sheets of metal independently fastened to thefront wall throughout only a portion of their edges where they abut thestiles. These rear sheets may be connected with each other byloose'rivetsin slotted holes but I prefer to interlock them in such away'a's to allow one to slide away from the other when the door is underexpansion.

' The walls of the door are preferably and when so preferably extendvertically and the corrugations of the rear wall extend horizontally; itwill be understood, however, that the corrugations of the several sheetsmay take some other relative position and that they may extend in anymanner which will be found best suited for my purpose.

The front and rear walls of the door may be riveted together by rivets,8 and 9, at the edges of the walls substantiallyin the same manner asshown in the aforesaid patent.

In doors of ordinary size, howevenl prefer, 'to omit the collars shownon rivets, 8, at the same time dispensing with'the spacing shown at 11.The rivets, 9, serve to secure the vertical or side edges of the frontand back walls and the legs of the hollow stiffening channels, 18. Theserivets 9 pass through the sections, or independent sheets bled theoverlap in these channels coincide with the overlaps in the sheetsforming the rear wall of the door. The outer legs of these "channels,13, after extending to the front of the door, and parallel with thereturned portion, 12 of the edge of the front wall, are turned towardtherear 'of the door, as at 14 until theystand parallelto the returnedor bent portion of the front wall, 12, the bent portions of the channelsand the bent portion of the front wall fitting together in tongue andgroove fashion. The telescoping parts, 12, of the front wall, and thecorresponding part, 14, of each of the channels, 13, are adapted toslide relative to each" other when the door, is exposed to hightemperatures, thus providing for eX-- pansion between the edge of thefront wall, 14, and the several sections of stiffening channels, 13. p

It will be seen that by reason of the interlock of the channels, orplates, 13, with the edge of the returned portion of the front wall, thebar shown at 14, Fig. 7 in the former patent may be dispensed with asthe channels will be held in alinement by theinterlock; and thestile-will be stiffened by four thicknesses of metal at the verticaledges of thedoor. For the samereason the spacing and stiffening bar, 11,and the collars or washers, 10, on rivets, 8, may be dispensed with,thus furthercheapening the cost of the door. Y

hollow stile section which is substantially square in cross section,said front sheet extending across the edge of the door and thencebent'and returned toward the front,

'and said channel member having a terminal portion which is bent towardthe rear of the door and foldably interlocked in sliding relation to thereturned portion of front sheet whereby the sheet and channel membersare exp'ansively connected."

'2. In a firedoor or shutter having a front wall substantially in asingle'piece and a rear wall comprised ofaplurality ofoverlapping metalsheets free to slide at their overlaps andjattached' to the front wallindependentlyof each other, a vertical stiffening frame composed-of aplurality of'stiffening sectlons, the number of said sectionscorresponding with the number of sections comprising the rear wall ofthe door, sald stiffening sections hav ng their outer edges foldablyconnected 'to'the-vertical edges of said front wall to form 'a slidableinterlock which compensates 'for unequal expansion.

3. In a sheet metal door, or shutter, having front and back walls,stiles formed in partby a plurality ofoverlapping stiffening meanseachattached to said wallsjindependently of each; other at pointsbetweentheir overlapping ends, said 'stifienin-g members being held in alinement by their fasten-" ings to said walls, and an interen'gagingfolded tongue and groove connection with the edge portion of the frontwall;

4. In a sheet "metal fire door or shutter having front and back walls, a'plurality of stiffening members attached to the main part of thedooi'f,and a stiffening frame formed in part by the overlapping of the frontwall and part by the stifiening members, saldstiifeni'ng members beingsubstantially square in. cross section and having edge 5 portionsffoldably interlocking with'the edge portionof said front wall.

, 5. In a fire door or shntter having a front wallsubstantially in asingle piece of metal, 'arear wall composed ofaplurality of overlappingindependent metal sheets, and an interposed layer of refractorymaterial, a

stiffening; frame compri'smga plurality of overlapping *stifi'eni'ngmembers, the number of said memberscorresponding substantially with thenumber of metal sheets in the rear wallof the r doon said stifien'ingmembersbeing held'ai n alinement by rivets, by

their overlapping and telescoping ends, and by foldably connecting theedges of the stiffening members with the edges of the front Wall of thedoor or shutter, whereby the stiffening frame expands in unison With thedoor or shutter When the same is exposed to( high temperatures.

6. In a sheet metal fire door or shutter structure, the combination of astiffening frame comprising a plurality of overlapping stifieningmembers and independent fas- Gopies 01 this patent may be obtained forfive cents each, by addressing the tenings therefor, and a slidabletongue and groove interlock formed by foldably connecting the edges ofthe members With the edges of the door.

In testimony whereof I affix my signature in presence of two Witnesses.

FELIX LAWRENCE SAINO.

Witnesses:

WM. F. DUNBAR, J. F. WALKER, Jr.

Commissioner of Patents,

Washington, D. G.

